The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2017
Filed:
Oct. 24, 2013
Hitachi Information & Telecommunication Engineering, Ltd., Nishi-ku, Yokohama-shi, Kanagawa-ken, JP;
Fumikazu Takahashi, Yokohama, JP;
Yoshihide Takahashi, Yokohama, JP;
Yusuke Katsuyama, Yokohama, JP;
Kimiaki Taniguchi, Yokohama, JP;
Akinori Uchida, Yokohama, JP;
Masahiro Hamaogi, Yokohama, JP;
Susumu Nagafuchi, Yokohama, JP;
Hitachi Information & Telecommunication Engineering, Ltd., Yokohama-shi, JP;
Abstract
A power storage system is provided with charge switches, discharge switches, a bidirectional DC/DC converter and a power storage system controller connecting all the battery packs to an external circuit to achieve parallel charge and discharge, and the power storage system starts the charge by setting a rated charge current value per one battery pack to Iset and setting the rated charge current value Iset as an initial value of a charge current command value Iref(1), thereafter monitor the charge current of each of the battery packs after elapse of a predetermined time so as to subtract its maximum value Ibmax(1) from the charge current command value Iref(1), and add the rated charge current value Iset to result of subtraction Ierr (Iref(1)−Ibmax(1)) so as to set as a new charge current command value Iref(2) and carry out pre-charge in such a manner as to carry on the charge.